种植密度对不同品种春玉米产量性状的影响

目的筛选适宜张家口市宣化县密植与机械化栽培的春玉米品种。方法通过对17个品种与郑单958田间对比试验,测定株高、穗位高、穗粒数、千粒重和产量等生长及产量指标,确定高产品种。结果低密度(67 500株.hm-2)下,北盛2号株高最高,德玉18穗位高最高,唐2143穗粒数最多,隆平206千粒重最大、隆平206产量最高。高密度(75 000株.hm-2)下,先玉335株高最高,巡天969穗位高最高,唐2143穗粒数最多,XS 1 102千粒重最大,隆平206产量最高。低密度下,隆平206、伟科702产量比郑单958分别增加了25.88%、21.87%,高密度下,隆平206和伟科702比郑单958分别增加了33.51%和29.12%。唐2号反交高密度比低密度产量增加了33.52%。结论隆平206、伟科702适宜在本地区推广,唐2号反交适宜在该地区高密度种植。

Effects of Plant Density on Properties of Grain Yield in Spring Maize of Different Types

Objective To select the variety of spring maize that can be planted in Xuanhua County,Zhangjiakou City and fit to mechanized farming.Methods The growth and yield indices of 17 maize varieties,including plant height,ear height,grain number per spike,thousandgrain weight and yield were determined to find out highyield variety,using Zhengdan 958 as the control.Results The results showed that at low density(67 500 plants/ha)the plant height of Beisheng 2 was the highest,the ear height of Deyu 18 the highest,the grain number per spike of Tang 2143 at most,the thousandgrain weight of Longping 206 maximum,and the yield of Longping 206 the highest,respectively;at high density(75 000 plants/ha),the plant height of Xianyu 335 was the highest,the ear height of Xuntian 969 the highest,the grain number per spike of Tang 2143 at most,the thousandgrain weight of XS 1 102 maximum,and the yield of Longping 206 the highest,respectively.Compared with Zhengdan 958,the yields of Longping 206 and Kewei 702 were increased respectively by 25.88% and 21.87% at the low density,and at the high density by 25.88% and 21.87%.The yield of Tang 2 at high density was 33.52% higher than the yield at high density.Conclusion The results reveal that Longping 206 and Kewei 702 can be planted in Xuanhua,and Tang 2 fits to be planted at high density.